Schmidt, S. A. and Kjérsgaard-andersen, P. (1988) “Indomethacin inhibits the recurrence of excised ectopic ossification after hip arthroplasty: A 3–4 year follow-up of 8 cases”, Acta Orthopaedica, 59(5), pp. 593–593. doi: 10.3109/17453678809148794.